Katharine Hope McPhee (born March 25, 1984) is an American pop singer, songwriter, actress, model, and television personality. She gained fame as a contestant on the fifth season of the Fox reality show American Idol in 2006, eventually finishing as the runner-up. McPhee has also established an acting career, co-starring in The House Bunny in 2008 as the hippie sorority sister Harmony, and in a starring role in the NBC series Smash.